Post-Translational Modification (PTM) Proteomics Services
Post-Translational Modification (PTM) Proteomics Services
What Are Post-Translational Modifications (PTMs)?
Post-translational modifications (PTMs) are covalent chemical changes added to proteins after synthesis, providing a rapid and often reversible mechanism to regulate protein activity, stability, subcellular localization, and molecular interactions. Common PTM types include phosphorylation, ubiquitination, glycosylation, and lysine acylations such as acetylation, lactylation, and succinylation. By modulating signaling pathways, gene expression, metabolism, and immune regulation, PTMs play central roles in biology and disease, and their dysregulation is frequently associated with cancer, neurodegeneration, metabolic disorders, and inflammation.
MetwareBio provides high-resolution LC–MS/MS-based PTM proteomics services for phosphoproteomics, ubiquitinomics, N-glycoproteomics, acetylproteomics, lactylproteomics, and succinylproteomics. Our workflow delivers site-specific identification and quantification, differential PTM analysis, motif discovery, and pathway and network interpretation, supporting research in cell signaling, disease mechanisms, metabolic regulation, and beyond.
Discover MetwareBio PTM Analysis Services
Why Choose MetwareBio for PTM Profiling
High Sensitivity and Site-Level Confidence
High-resolution LC–MS/MS paired with PTM-specific enrichment enables sensitive detection and confident site localization, capturing low-abundance modification events.
Sample-Adaptive Workflow Design
Customized preparation for cell lines, tissues, and clinical specimens optimizes protein extraction, digestion, and PTM recovery, improving coverage and quantitative consistency.
Broad PTM Portfolio Expertise
Deep experience across phosphorylation, ubiquitination, N-glycosylation, acetylation, lactylation, and succinylation supports robust data generation and interpretation for diverse biological questions.
Pathway-Focused Biological Interpretation
Integrated bioinformatics links PTM changes to upstream regulators and downstream pathways through differential analysis, motif discovery, and pathway/network mapping.
End-to-end expert support
Expert support across experimental design, sample preparation, and data interpretation enables efficient generation of publication-ready conclusions.
Standardized Workflow for PTM Analysis
MetwareBio’s PTM analysis workflow follows standardized SOPs to ensure consistency, reproducibility, and reliable cross-sample comparison. Quality-controlled samples undergo protein extraction and trypsin digestion, followed by PTM-modified peptides enrichment to enhance sensitivity for low-abundance events. High-resolution LC–MS/MS then enables confident, site-specific identification and quantitative PTM profiling. Downstream bioinformatics delivers site-level quantification, differential PTM analysis, motif discovery, and pathway/network interpretation, producing publication-ready results for mechanistic studies and biomarker discovery.
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Sample Shipment
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Protein Extraction
3
Trypsin Digestion
4
PTM Peptide
Enrichment
Enrichment
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LC-MS/MS
Detection
Detection
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Data Analysis
PTM Bioinformatics Analysis & Deliverables
MetwareBio provides reliable, site-resolved PTM profiling with strict quality control and end-to-end
bioinformatics support. The final report includes curated PTM site identification and quantification tables,
along with sample-level QC summaries such as PCA, correlation, and clustering to confirm data consistency.
Differential PTM analysis is combined with multi-layer functional interpretation, including GO/KEGG/KOG
annotations, protein domain analysis, motif enrichment, subcellular localization inference, and
protein–protein interaction network mapping. Results are delivered as clearly formatted, publication-ready
spreadsheets and professional figures, accelerating biological interpretation and supporting downstream
validation, translational studies, and manuscript writing. Contact Us for Demo
Volcano Plot
Clustering Heatmap
Motif Analysis
GO Enrichment
KEGG Pathway Map
KOG Enrichment
Subcellular Localization
Protein–Protein Interaction Network
Signal Peptide Prediction Map
Why PTM Profiling Matters?
Post-translational modifications (PTMs) provide a direct, site-specific readout of protein regulation that cannot be inferred from gene expression alone. PTM profiling helps reveal when and where signaling is activated, how protein stability and turnover are controlled, and how metabolic states reshape cellular functions. By mapping differential PTM sites and linking them to pathways and regulatory networks, PTM proteomics supports mechanism discovery, target and pathway validation, and biomarker research across cancer, immunology, neuroscience, and metabolic disease.
Frequently Asked Questions (FAQs) on PTM Analysis
1. What are the main types of protein PTMs, and how are they different?
Protein post-translational modifications (PTMs) include phosphorylation, ubiquitination, glycosylation, and lysine acylations such as acetylation, lactylation, and succinylation. They differ in chemical structure, the enzymes that write/erase them, their typical cellular locations, and biological functions. For example, phosphorylation often reflects rapid signaling activation, ubiquitination is closely tied to protein degradation and trafficking, glycosylation is common on secreted and membrane proteins, and lysine acylations frequently connect protein regulation to cellular metabolic state.
2. Why does PTM proteomics usually require enrichment before LC–MS/MS?
Most PTM peptides are low in abundance relative to unmodified peptides, so direct LC–MS/MS can miss key modification sites. PTM enrichment concentrates modified peptides and reduces sample complexity, improving sensitivity, expanding PTM site coverage, and increasing confidence in site-specific PTM identification and quantification.
3. What PTM enrichment strategies are commonly used in mass spectrometry?
Common approaches include affinity-based capture (e.g., antibodies or binding proteins), chemical or lectin-based enrichment for glycopeptides, and chromatography or metal-affinity concepts that selectively retain modified peptides. The optimal enrichment strategy depends on the PTM type, sample matrix, and the desired balance between depth, specificity, and quantitative consistency.
4. What quantification methods do you offer for PTM proteomics (label-free vs TMT)?
MetwareBio provides label-free quantitative PTM proteomics, with both DDA and DIA acquisition options depending on study scale and reproducibility needs. Label-based quantification (e.g., TMT/iTRAQ) is not offered for PTM projects on this platform. Recommended acquisition mode and design are proposed based on sample number, expected effect size, and biological complexity.
5. DDA vs DIA for PTM analysis: which should I choose?
DDA is widely used for deep PTM site discovery and building rich identification lists, while DIA is often preferred for higher quantitative completeness and reproducibility across larger cohorts. Selection depends on whether the primary goal is discovery depth (often DDA) or consistent quantification across many samples (often DIA).
6. Which PTM should I profile for cancer research?
For cancer signaling and kinase pathway activation, phosphorylation profiling is typically the first choice. Ubiquitination profiling is highly relevant for proteostasis, DNA damage responses, and targeted protein degradation mechanisms. Lysine acetylation and lactylation can be valuable for studies of epigenetic regulation, tumor metabolism, hypoxia, and immune microenvironment effects. The best PTM depends on the specific hypothesis and pathway of interest.
7. Which PTM is most relevant for immunity and inflammation studies?
Phosphorylation is commonly used to map immune receptor signaling and downstream pathway activation. Ubiquitination is important for innate immune signaling, NF-κB regulation, and protein turnover control. Lactylation has gained attention for linking glycolysis-driven metabolic states to immune cell function and inflammatory phenotypes.
8. Which PTM is recommended for metabolism, mitochondria, and energy regulation research?
Lysine acylations are often highly informative. Acetylation and succinylation are frequently connected to mitochondrial enzymes and metabolic flux, while lactylation can reflect glycolytic activity and metabolic reprogramming. PTM site-level changes can help pinpoint regulated enzymes and pathways beyond total protein abundance.
9. When should N-glycoproteomics be considered instead of other PTMs?
N-glycoproteomics is especially useful when the focus is on secreted proteins, membrane proteins, receptors, cell–cell communication, or clinically relevant glycoproteins. It can support biomarker-oriented studies and functional characterization of glycosylation changes that are not captured by phosphorylation or lysine acylation profiling.
Key Applications of PTM Proteomics
Biomedical and Disease Research
Site-specific PTM proteomics reveals dysregulated signaling and protein regulation in cancer, inflammation, neurodegeneration, and metabolic disease, supporting mechanism studies and biomarker discovery.
Animal Biology and Translational Models
Quantitative PTM profiling in animal tissues and cells captures dynamic regulation driven by genetics, diet, infection, or drugs, enabling pathway-level interpretation in translational models.
Plant Biology and Crop Science
PTM analysis uncovers regulatory mechanisms behind hormone signaling, stress responses, and development, helping identify pathways linked to yield, quality, and resilience.
Microbiology and Host–Microbe Studies
PTM profiling clarifies microbial regulation of growth, metabolism, and virulence, and supports host–microbe research by linking PTM changes to functional pathways and networks.
Applications of Metabolomics Services
Next-Generation Omics Solutions:
Proteomics & Metabolomics
Have a project in mind? Tell us about your research, and our team will design a customized proteomics or metabolomics plan to support your goals.
Ready to get started? Submit your inquiry or contact us at support-global@metwarebio.com.
Ready to get started? Submit your inquiry or contact us at support-global@metwarebio.com.
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